Restaurant Menu Board Acrylic Solutions
Look, we've been fabricating acrylic menu boards since 2012. Started with a small bubble tea chain in Guangzhou, now we're shipping to restaurant groups across Southeast Asia, the Middle East, and parts of Europe. This isn't a sales pitch-we just want to share what actually works and what doesn't, because honestly, we're tired of fixing other people's mistakes.
Why Acrylic Instead of Glass? It's Not Even Close
We still get clients asking "why not just use tempered glass?"
Here's the thing: a 6mm glass panel for a standard 60×90cm menu board weighs around 20-something kilos. Same size in cast acrylic? Maybe 10, 11 kilos. Two guys can mount it in fifteen minutes without calling for backup.
And when glass breaks-because it will, eventually-you've got safety hazards everywhere. We had a café in Dubai where a waiter bumped the corner of a glass menu board with a tray. Shattered. Took them three hours to clean up, and they had to close that section for lunch service. Acrylic? Worst case it cracks. Usually just a chip on the corner. Nobody gets hurt.
Light transmission is actually better too. Good cast acrylic hits 92% or thereabouts, which is slightly higher than standard glass. Most people can't tell the difference visually, but for backlit boards it matters.
The Cast vs. Extruded Debate (Yes, It Actually Matters)
We've had this argument with purchasing managers more times than we can count.
Extruded acrylic is cheaper. About 30-40% cheaper depending on thickness. And for some applications-temporary signage, indoor displays that won't see much abuse-it's fine. We use it ourselves sometimes.
But for menu boards in actual restaurants? Cast. Every time.
Here's why: extruded sheets have internal stress from the manufacturing process. Put them near a heat source-and restaurant kitchens are basically giant heat sources-and they warp. We've seen boards that looked like potato chips after six months next to a pizza oven.
Cast acrylic is denser, more stable. The molecular structure is different. It machines cleaner, polishes better, and doesn't yellow as fast under UV exposure. For a board that's supposed to last 5-8 years minimum, the upfront cost difference is nothing.
One job that still haunts us: 2019, a fried chicken franchise insisted on extruded to save money. We warned them. They didn't listen. Their procurement guy was new and trying to prove himself by cutting costs. Eight months later, every single board in their 23 locations had edge crazing and two had visible warping. They ended up replacing everything with cast. Cost them triple what they "saved."
Thickness: The 5mm Sweet Spot
For most restaurant menu boards, 5mm cast acrylic is the answer.
3mm is too flimsy for anything over 40cm in any dimension. It flexes, it bows, it looks cheap. We only use 3mm for small tabletop holders, the kind you put on tables for daily specials.
8mm and above is overkill unless you're doing floor-standing displays or outdoor installations. Heavy, expensive, and the optical quality isn't noticeably better.
5mm gives you enough rigidity for wall-mounted boards up to about 120×80cm without needing elaborate frame support. It handles thermal expansion reasonably well. And it's thick enough that edge polishing looks professional-thin acrylic edges always look a bit... sad.
For the backlit stuff, we sometimes go 6mm because it diffuses LED hotspots slightly better. But that's getting into the weeds.
Thermal Expansion: The Thing Everyone Forgets
Acrylic expands when it heats up. A lot more than glass or aluminum. The coefficient is somewhere around 7×10⁻⁵ per degree Celsius-don't memorize that, just remember it's significant.
What this means practically: a 1-meter wide board can grow 3-4mm between a cold morning and a hot afternoon, especially if it's near windows or kitchen heat.
The fix is simple: expansion gaps.
We leave 5-8mm clearance on all sides when mounting. Use slotted holes instead of round ones for the mounting hardware so the panel can "breathe."
Sounds obvious, right? You'd be amazed how many installers-including some who should know better-mount acrylic panels with tight tolerances and fixed screws. Then summer comes and the whole thing buckles or cracks at the mounting points.
We had a nightmare job in 2022. Bubble tea chain, very Instagram-focused, wanted these gorgeous edge-lit menu boards with super clean lines. Their interior designer spec'd 2mm gaps all around because "it looks better." We pushed back. They insisted. Six weeks after install, middle of July, three boards cracked at the screw holes. Designer blamed us. We showed them our original email recommending 6mm gaps. They paid for replacements.
Backlit Boards: What Actually Works
Everyone wants backlit menu boards now. They look great in photos, customers love them, they justify higher prices psychologically. But the execution is usually terrible.
Common mistakes we see:
The LED strips are too close to the acrylic. You get hotspots-bright lines where the LEDs are, dimmer areas between them. Looks amateurish. Minimum 40-50mm setback from the diffuser panel, ideally more.
The acrylic is too thin. 3mm doesn't diffuse well; you see the individual LED points through it. 5mm minimum, 6mm preferred.
Wrong acrylic type. Clear acrylic with a separate diffuser film is fine. Opal (milky white) acrylic is better but more expensive and the color temperature shifts slightly. Frosted acrylic is a middle ground that works for most restaurants.
No ventilation in the light box. LEDs generate heat. In an enclosed box, that heat builds up, shortens LED lifespan, and accelerates acrylic yellowing. Simple ventilation slots at top and bottom solve this. Takes five minutes to add during fabrication.
What works well:
We've standardized on 5mm opal cast acrylic with edge-lit LED configuration for smaller boards (under 60cm) and rear-lit with proper setback for larger ones. Samsung or Philips LED strips, not the cheap stuff from Alibaba. Proper aluminum housing with thermal management. Lasts 8-10 years easily, maintains consistent brightness.
Cleaning and Maintenance-The Unsexy Part
Restaurant menu boards get dirty. Grease, fingerprints, cleaning spray residue, marker ink if you're doing daily specials by hand.
Never use:
Ammonia-based cleaners (Windex, etc.), alcohol wipes, paper towels, anything abrasive. All of these micro-scratch the surface over time. After two years the board looks hazy and dull.
Always use:
Microfiber cloth, mild soap and water, or specialized plastic cleaners. That's it. Boring but effective.
We actually include a small maintenance guide with every shipment now. Laminated card, hangs behind the counter. Cut our warranty claims by maybe 40% just from that.
For boards near kitchens-anything within 3 meters of a fryer or grill-we recommend a hard-coat treatment. Adds about 15% to the cost but makes cleaning much easier and extends the lifespan significantly. Some clients skip this to save money, then complain when the surface hazes up. You can't win every battle.
Quick Spec Reference
For anyone just looking for the short version:
| Application | Recommended Spec |
|---|---|
| Small tabletop holder | 3mm clear extruded, fine for this |
| Wall menu board (no backlight) | 5mm cast, clear or colored |
| Backlit wall board | 5-6mm opal or frosted cast |
| Outdoor/high-heat environment | 6mm+ cast with UV stabilization, hard coat |
| Floor-standing display | 8-10mm cast with proper base support |
Expansion gaps: 5-8mm minimum on all sides. Non-negotiable.
Mounting: Slotted holes, not round. Rubber or nylon washers to prevent stress cracking.
Working With Us (or Anyone Else, Really)
If you're sourcing menu boards for a restaurant group or franchise, here's what makes the process smoother:
Provide actual dimensions, not "approximately 60cm." We've had orders come back because "approximately" meant different things to different people.
Tell us about the environment. Near a kitchen? Outdoor patio? Direct sunlight? Air-conditioned 24/7? This changes material recommendations significantly.
Don't cheap out on thickness to save a few dollars. You'll pay more in replacements and frustrated customers than you ever saved.
If you need samples, ask for them. We send out material samples all the time. Better to see and feel the difference between cast and extruded before committing to a 50-location rollout.
That's the brain dump. Twelve years of installing menu boards in restaurants from Shanghai to Riyadh, condensed into one post. If you're planning a project and want to talk specifics, you know where to find us. If you just needed the technical info, hope this helped.
- The fabrication team at OUKE Display
